聚稳丁腈橡胶的小试合成  

Synthesis of polymerization-stable nitrile rubber in bench-scale test

作　　者：肖瑞[1] 李冬红[1] 张霖[1] 米普科[2] 李彤霞[1] 潘广勤[1] 

机构地区：[1]中国石油兰州石化公司研究院,兰州730060 [2]华东理工大学材料科学与工程学院,上海200237

出　　处：《合成橡胶工业》2012年第2期98-101,共4页China Synthetic Rubber Industry

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(0904 A 06-04)

摘　　要：以丁二烯(Bd)和丙烯腈(AN)为单体,防老剂NAPM为反应型防老剂,过氧化氢二异丙苯(DBHP)为引发剂,松香酸皂(ROSIN)为乳化剂,β-萘磺酸钠甲醛缩合物(NF)为助乳化剂,叔十二碳硫醇(TDM)为相对分子质量调节剂,进行了聚稳丁腈橡胶的小试合成研究,考察了各组分以及聚合反应温度对转化率的影响,并对合成的聚稳丁腈橡胶与国外公司的同类产品N 765的性能进行了对比。结果表明,在Bd/AN(质量比)为70/30、防老剂NAPM质量分数为1.5%～2.0%(以Bd和AN总量计,下同)、TDM质量分数为0.46%～0.51%、DBHP/FeSO4(质量比)为0.150/0.017 5、ROSIN/NF(质量比)为(4.6～5.0)/0.6的条件下,采用在反应最初1 h内将反应温度控制在15℃、之后将温度降至5℃并保持至反应结束的温度控制方式,可合成出力学性能和热氧老化性能与N 765相当的聚稳丁腈橡胶。The polymerization-stable nitrile rubber was synthesized in a bench-scale unit with butadiene （Bd） and acrylonitrile（AN） as monomers, antioxidant NAPM as reac- tive antioxidant, p-dipropylbenzene hydroperoxide （DBHP） as initiator, rosin as emulsifier, sodium naphthalenesulfonate- formaldehyde condensate （NF） as coemulsifier, tert-dodecyl mercaptan（TDM） as relative molecular mass regulator. The effects of the components and polymerization temperature on the conversion of polymerization reaction were investigated. And the properties of polymerization-stable nitrile rubber were compared with those of similar product N 765 produced by foreign company. The results showed that the polymerization- stable nitrile rubber could be synthesized, and its mechanical properties and thermal-oxidative aging properties were similar to those of N 765 when Bd/AN （ mass ratio） was 70/30, the mass fraction of antioxidant NAPM was 1.5% - 2.0% （ by to- tal amount of Bd and AN）, the mass fraction of TDM was 0.46% -0. 51% （by total amount of Bd and AN） , DBHP/ FeSO4 （ mass ratio ） was 0. 150/0. 017 5, rosin/NF （mass ratio） （4.6 - 5.0）/0. 6, and the optimized tempera- ture control mode was that temperature was controlled at 15 ℃ in first 1 h, and then decreased to 5 ℃ and kept at the same temperature until the end of reaction.

关 键 词：聚稳丁腈橡胶 反应型防老剂 转化率 乳液稳定性 力学性能 热氧老化性能 

分 类 号：TQ333.7[化学工程—橡胶工业]